import jdk.internal.org.objectweb.asm.tree.MultiANewArrayInsnNode;

public class Test {
    public static void main(String[] args) {
        String s="hello world";

     /*  String[] ss= s.split(" ");
      String m=ss[ss.length-1];
        System.out.println(m.length());
*/
        System.out.println(s.substring(6).length());

    }
}
